52 citations · 230 across the 10 of their papers we have counts for
10 papers · 1 filter
Detecting the HI Power Spectrum in the Post-Reionization Universe with SKA-Low
Zhaoting Chen, Emma Chapman, Laura Wolz +1
We present a survey strategy to detect the neutral hydrogen (HI) power spectrum at using the SKA-Low radio telescope in presence of foregrounds and instrumental effects. We…
A direct detection of neutral hydrogen intensity mapping on Mpc scales at and
Sourabh Paul, Zhaoting Chen, Mario G. Santos +1
We report the detection of the cosmological power spectrum using the intensity mapping signal from 21-cm emission of neutral hydrogen (HI), derived from interferometric observation…
Towards Optimal Foreground Mitigation Strategies for Interferometric HI Intensity Mapping in the Low-Redshift Universe
Zhaoting Chen, Laura Wolz, Richard Battye
We conduct the first case study towards developing optimal foreground mitigation strategies for neutral hydrogen (HI) intensity mapping using radio interferometers at low redshifts…
Self-calibration of photometric redshift scatter from DECaLS DR8 power spectrum and validation with simulated catalogues
Hui Peng, Haojie Xu, Le Zhang +2
The uncertainty in the photometric redshift estimation is one of the major systematics in weak lensing cosmology. The self-calibration method is able to reduce this systematics wit…
Extracting HI Astrophysics from Interferometric Intensity Mapping
Zhaoting Chen, Laura Wolz, Marta Spinelli +1
We present a new halo model of neutral hydrogen (HI) calibrated to galaxy formation simulations at redshifts and that we employ to investigate the constrainin…
TheHaloMod: An online calculator for the halo model
Steven G. Murray, Benedikt Diemer, Zhaoting Chen +5
The halo model is a successful framework for describing the distribution of matter in the Universe -- from weak lensing observables to galaxy 2-point correlation functions. We revi…
The Weak Lensing Peak Statistics in the Mocks by the inverse-Gaussianization Method
Zhao Chen, Yu Yu, Xiangkun Liu +1
We apply the inverse-Gaussianization method proposed in \citealt{arXiv:1607.05007} to fast produce weak lensing convergence maps and investigate the peak statistics, including the…
New test on general relativity and torsional gravity from galaxy-galaxy weak lensing surveys
Zhaoting Chen, Wentao Luo, Yi-Fu Cai +1
We use galaxy-galaxy weak lensing data to perform a novel test on general relativity (GR) and torsional gravity. In particular, we impose strong constraints using the torsio…
Testing the scale-dependent hemispherical asymmetry with the 21-cm power spectrum from the epoch of reionization
Botao Li, Zhaoting Chen, Yi-Fu Cai +1
Hemispherical power asymmetry has emerged as a new challenge to cosmology in early universe. While the cosmic microwave background (CMB) measurements indicated the asymmetry amplit…
Stages of Reionization as revealed by the Minkowski Functionals
Zhaoting Chen, Yidong Xu, Yougang Wang +1
We study the evolution of the hydrogen ionization field during the epoch of reionization (EoR) using semi-numerical simulations. By calculating the Minkowski functionals (MFs) of t…